Substrate and touch panel member using same
The present invention aims to provide a substrate having an ITO with a low ITO pattern visibility, which substrate is formed by a method utilizing a simple technique such as coating, printing or the like, and which method is less burdensome from the viewpoints of cost and process; and to provide a touch panel member using the substrate. The present invention provides a substrate including a region where thin layers are laminated on a transparent ground substrate, which thin layers are, in the order mentioned from the upper surface of the substrate: an ITO (Indium Tin Oxide) thin layer (I); an organic thin layer (II) having a film thickness of from 0.01 to 0.4 μm and a refractive index of from 1.58 to 1.85; and a transparent adhesive thin layer (III) having a refractive index of from 1.46 to 1.52.
1. A substrate comprising a region where thin layers are laminated on a transparent ground substrate, which thin layers are, in the order mentioned from the upper surface of the substrate, an ITO thin layer (I), an organic thin layer (II) having a film thickness of from 0.01 to 0.4 um and a refractive index of from 1.58 to 1.85; and a transparent adhesive thin layer (III) having a refractive index of from 1.46 to 1.52, wherein said organic thin layer (II) contains a resin selected from the group consisting of polyimides, cardo type resins, acrylic resins, polysiloxanes, polybenzoxazoles, phenol resins, polyamideimides, polyethersulfones, polyurethanes and polyesters; wherein said organic thin layer (II) contains metal oxide particles.
2. The substrate according to claim 1 , wherein said organic thin layer (II) contains a resin selected from the group consisting of polyimides, cardo type resins, polysiloxanes, polybenzoxazoles, phenol resins, polyamideimides, polyethersulfones and polyesters.
3. The substrate according to claim 1 , wherein said organic thin layer (II) contains a resin containing a carboxyl group and/or a phenolic hydroxyl group.
4. The substrate according to claim 1 , wherein said organic thin layer (II) is formed using a resin composition containing a precursor selected from the group consisting of polyimide precursors, polyamideimide precursors and polybenzoxazole precursors.
5. The substrate according to claim 1 , wherein said transparent ground substrate is a tempered glass substrate.
6. A touch panel member using the substrate according to claim 1 .